apt-pkg/deb/dpkgpm.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: dpkgpm.cc,v 1.28 2004/01/27 02:25:01 mdz Exp $
   4 /* ######################################################################
   5
   6    DPKG Package Manager - Provide an interface to dpkg
   7
   8    ##################################################################### */
   9                                                                         /*}}}*/
  10 // Includes                                                             /*{{{*/
  11 #include <config.h>
  12
  13 #include <apt-pkg/dpkgpm.h>
  14 #include <apt-pkg/error.h>
  15 #include <apt-pkg/configuration.h>
  16 #include <apt-pkg/depcache.h>
  17 #include <apt-pkg/pkgrecords.h>
  18 #include <apt-pkg/strutl.h>
  19 #include <apt-pkg/fileutl.h>
  20 #include <apt-pkg/cachefile.h>
  21 #include <apt-pkg/packagemanager.h>
  22
  23 #include <unistd.h>
  24 #include <stdlib.h>
  25 #include <fcntl.h>
  26 #include <sys/select.h>
  27 #include <sys/stat.h>
  28 #include <sys/types.h>
  29 #include <sys/wait.h>
  30 #include <signal.h>
  31 #include <errno.h>
  32 #include <string.h>
  33 #include <stdio.h>
  34 #include <string.h>
  35 #include <algorithm>
  36 #include <sstream>
  37 #include <map>
  38 #include <pwd.h>
  39 #include <grp.h>
  40
  41 #include <termios.h>
  42 #include <unistd.h>
  43 #include <sys/ioctl.h>
  44 #include <pty.h>
  45
  46 #include <apti18n.h>
  47                                                                         /*}}}*/
  48
  49 using namespace std;
  50
  51 class pkgDPkgPMPrivate
  52 {
  53 public:
  54    pkgDPkgPMPrivate() : dpkgbuf_pos(0), term_out(NULL), history_out(NULL)
  55    {
  56    }
  57    bool stdin_is_dev_null;
  58    // the buffer we use for the dpkg status-fd reading
  59    char dpkgbuf[1024];
  60    int dpkgbuf_pos;
  61    FILE *term_out;
  62    FILE *history_out;
  63    string dpkg_error;
  64 };
  65
  66 namespace
  67 {
  68   // Maps the dpkg "processing" info to human readable names.  Entry 0
  69   // of each array is the key, entry 1 is the value.
  70   const std::pair<const char *, const char *> PackageProcessingOps[] = {
  71     std::make_pair("install",   N_("Installing %s")),
  72     std::make_pair("configure", N_("Configuring %s")),
  73     std::make_pair("remove",    N_("Removing %s")),
  74     std::make_pair("purge",    N_("Completely removing %s")),
  75     std::make_pair("disappear", N_("Noting disappearance of %s")),
  76     std::make_pair("trigproc",  N_("Running post-installation trigger %s"))
  77   };
  78
  79   const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps;
  80   const std::pair<const char *, const char *> * const PackageProcessingOpsEnd   = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]);
  81
  82   // Predicate to test whether an entry in the PackageProcessingOps
  83   // array matches a string.
  84   class MatchProcessingOp
  85   {
  86     const char *target;
  87
  88   public:
  89     MatchProcessingOp(const char *the_target)
  90       : target(the_target)
  91     {
  92     }
  93
  94     bool operator()(const std::pair<const char *, const char *> &pair) const
  95     {
  96       return strcmp(pair.first, target) == 0;
  97     }
  98   };
  99 }
 100
 101 /* helper function to ionice the given PID
 102
 103  there is no C header for ionice yet - just the syscall interface
 104  so we use the binary from util-linux
 105 */
 106 static bool
 107 ionice(int PID)
 108 {
 109    if (!FileExists("/usr/bin/ionice"))
 110       return false;
 111    pid_t Process = ExecFork();
 112    if (Process == 0)
 113    {
 114       char buf[32];
 115       snprintf(buf, sizeof(buf), "-p%d", PID);
 116       const char *Args[4];
 117       Args[0] = "/usr/bin/ionice";
 118       Args[1] = "-c3";
 119       Args[2] = buf;
 120       Args[3] = 0;
 121       execv(Args[0], (char **)Args);
 122    }
 123    return ExecWait(Process, "ionice");
 124 }
 125
 126 // DPkgPM::pkgDPkgPM - Constructor                                      /*{{{*/
 127 // ---------------------------------------------------------------------
 128 /* */
 129 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache)
 130    : pkgPackageManager(Cache), PackagesDone(0), PackagesTotal(0)
 131 {
 132    d = new pkgDPkgPMPrivate();
 133 }
 134                                                                         /*}}}*/
 135 // DPkgPM::pkgDPkgPM - Destructor                                       /*{{{*/
 136 // ---------------------------------------------------------------------
 137 /* */
 138 pkgDPkgPM::~pkgDPkgPM()
 139 {
 140    delete d;
 141 }
 142                                                                         /*}}}*/
 143 // DPkgPM::Install - Install a package                                  /*{{{*/
 144 // ---------------------------------------------------------------------
 145 /* Add an install operation to the sequence list */
 146 bool pkgDPkgPM::Install(PkgIterator Pkg,string File)
 147 {
 148    if (File.empty() == true || Pkg.end() == true)
 149       return _error->Error("Internal Error, No file name for %s",Pkg.Name());
 150
 151    // If the filename string begins with DPkg::Chroot-Directory, return the
 152    // substr that is within the chroot so dpkg can access it.
 153    string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/");
 154    if (chrootdir != "/" && File.find(chrootdir) == 0)
 155    {
 156       size_t len = chrootdir.length();
 157       if (chrootdir.at(len - 1) == '/')
 158         len--;
 159       List.push_back(Item(Item::Install,Pkg,File.substr(len)));
 160    }
 161    else
 162       List.push_back(Item(Item::Install,Pkg,File));
 163
 164    return true;
 165 }
 166                                                                         /*}}}*/
 167 // DPkgPM::Configure - Configure a package                              /*{{{*/
 168 // ---------------------------------------------------------------------
 169 /* Add a configure operation to the sequence list */
 170 bool pkgDPkgPM::Configure(PkgIterator Pkg)
 171 {
 172    if (Pkg.end() == true)
 173       return false;
 174
 175    List.push_back(Item(Item::Configure, Pkg));
 176
 177    // Use triggers for config calls if we configure "smart"
 178    // as otherwise Pre-Depends will not be satisfied, see #526774
 179    if (_config->FindB("DPkg::TriggersPending", false) == true)
 180       List.push_back(Item(Item::TriggersPending, PkgIterator()));
 181
 182    return true;
 183 }
 184                                                                         /*}}}*/
 185 // DPkgPM::Remove - Remove a package                                    /*{{{*/
 186 // ---------------------------------------------------------------------
 187 /* Add a remove operation to the sequence list */
 188 bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge)
 189 {
 190    if (Pkg.end() == true)
 191       return false;
 192
 193    if (Purge == true)
 194       List.push_back(Item(Item::Purge,Pkg));
 195    else
 196       List.push_back(Item(Item::Remove,Pkg));
 197    return true;
 198 }
 199                                                                         /*}}}*/
 200 // DPkgPM::SendV2Pkgs - Send version 2 package info                     /*{{{*/
 201 // ---------------------------------------------------------------------
 202 /* This is part of the helper script communication interface, it sends
 203    very complete information down to the other end of the pipe.*/
 204 bool pkgDPkgPM::SendV2Pkgs(FILE *F)
 205 {
 206    fprintf(F,"VERSION 2\n");
 207
 208    /* Write out all of the configuration directives by walking the
 209       configuration tree */
 210    const Configuration::Item *Top = _config->Tree(0);
 211    for (; Top != 0;)
 212    {
 213       if (Top->Value.empty() == false)
 214       {
 215          fprintf(F,"%s=%s\n",
 216                  QuoteString(Top->FullTag(),"=\"\n").c_str(),
 217                  QuoteString(Top->Value,"\n").c_str());
 218       }
 219
 220       if (Top->Child != 0)
 221       {
 222          Top = Top->Child;
 223          continue;
 224       }
 225
 226       while (Top != 0 && Top->Next == 0)
 227          Top = Top->Parent;
 228       if (Top != 0)
 229          Top = Top->Next;
 230    }
 231    fprintf(F,"\n");
 232
 233    // Write out the package actions in order.
 234    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 235    {
 236       if(I->Pkg.end() == true)
 237          continue;
 238
 239       pkgDepCache::StateCache &S = Cache[I->Pkg];
 240
 241       fprintf(F,"%s ",I->Pkg.Name());
 242       // Current version
 243       if (I->Pkg->CurrentVer == 0)
 244          fprintf(F,"- ");
 245       else
 246          fprintf(F,"%s ",I->Pkg.CurrentVer().VerStr());
 247
 248       // Show the compare operator
 249       // Target version
 250       if (S.InstallVer != 0)
 251       {
 252          int Comp = 2;
 253          if (I->Pkg->CurrentVer != 0)
 254             Comp = S.InstVerIter(Cache).CompareVer(I->Pkg.CurrentVer());
 255          if (Comp < 0)
 256             fprintf(F,"> ");
 257          if (Comp == 0)
 258             fprintf(F,"= ");
 259          if (Comp > 0)
 260             fprintf(F,"< ");
 261          fprintf(F,"%s ",S.InstVerIter(Cache).VerStr());
 262       }
 263       else
 264          fprintf(F,"> - ");
 265
 266       // Show the filename/operation
 267       if (I->Op == Item::Install)
 268       {
 269          // No errors here..
 270          if (I->File[0] != '/')
 271             fprintf(F,"**ERROR**\n");
 272          else
 273             fprintf(F,"%s\n",I->File.c_str());
 274       }
 275       if (I->Op == Item::Configure)
 276          fprintf(F,"**CONFIGURE**\n");
 277       if (I->Op == Item::Remove ||
 278           I->Op == Item::Purge)
 279          fprintf(F,"**REMOVE**\n");
 280
 281       if (ferror(F) != 0)
 282          return false;
 283    }
 284    return true;
 285 }
 286                                                                         /*}}}*/
 287 // DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/
 288 // ---------------------------------------------------------------------
 289 /* This looks for a list of scripts to run from the configuration file
 290    each one is run and is fed on standard input a list of all .deb files
 291    that are due to be installed. */
 292 bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 293 {
 294    Configuration::Item const *Opts = _config->Tree(Cnf);
 295    if (Opts == 0 || Opts->Child == 0)
 296       return true;
 297    Opts = Opts->Child;
 298
 299    unsigned int Count = 1;
 300    for (; Opts != 0; Opts = Opts->Next, Count++)
 301    {
 302       if (Opts->Value.empty() == true)
 303          continue;
 304
 305       // Determine the protocol version
 306       string OptSec = Opts->Value;
 307       string::size_type Pos;
 308       if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0)
 309          Pos = OptSec.length();
 310       OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos);
 311
 312       unsigned int Version = _config->FindI(OptSec+"::Version",1);
 313
 314       // Create the pipes
 315       int Pipes[2];
 316       if (pipe(Pipes) != 0)
 317          return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
 318       SetCloseExec(Pipes[0],true);
 319       SetCloseExec(Pipes[1],true);
 320
 321       // Purified Fork for running the script
 322       pid_t Process = ExecFork();
 323       if (Process == 0)
 324       {
 325          // Setup the FDs
 326          dup2(Pipes[0],STDIN_FILENO);
 327          SetCloseExec(STDOUT_FILENO,false);
 328          SetCloseExec(STDIN_FILENO,false);
 329          SetCloseExec(STDERR_FILENO,false);
 330
 331          if (_config->FindDir("DPkg::Chroot-Directory","/") != "/")
 332          {
 333             std::cerr << "Chrooting into "
 334                       << _config->FindDir("DPkg::Chroot-Directory")
 335                       << std::endl;
 336             if (chroot(_config->FindDir("DPkg::Chroot-Directory","/").c_str()) != 0)
 337                _exit(100);
 338          }
 339
 340          const char *Args[4];
 341          Args[0] = "/bin/sh";
 342          Args[1] = "-c";
 343          Args[2] = Opts->Value.c_str();
 344          Args[3] = 0;
 345          execv(Args[0],(char **)Args);
 346          _exit(100);
 347       }
 348       close(Pipes[0]);
 349       FILE *F = fdopen(Pipes[1],"w");
 350       if (F == 0)
 351          return _error->Errno("fdopen","Faild to open new FD");
 352
 353       // Feed it the filenames.
 354       if (Version <= 1)
 355       {
 356          for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
 357          {
 358             // Only deal with packages to be installed from .deb
 359             if (I->Op != Item::Install)
 360                continue;
 361
 362             // No errors here..
 363             if (I->File[0] != '/')
 364                continue;
 365
 366             /* Feed the filename of each package that is pending install
 367                into the pipe. */
 368             fprintf(F,"%s\n",I->File.c_str());
 369             if (ferror(F) != 0)
 370                break;
 371          }
 372       }
 373       else
 374          SendV2Pkgs(F);
 375
 376       fclose(F);
 377
 378       // Clean up the sub process
 379       if (ExecWait(Process,Opts->Value.c_str()) == false)
 380          return _error->Error("Failure running script %s",Opts->Value.c_str());
 381    }
 382
 383    return true;
 384 }
 385                                                                         /*}}}*/
 386 // DPkgPM::DoStdin - Read stdin and pass to slave pty                   /*{{{*/
 387 // ---------------------------------------------------------------------
 388 /*
 389 */
 390 void pkgDPkgPM::DoStdin(int master)
 391 {
 392    unsigned char input_buf[256] = {0,};
 393    ssize_t len = read(0, input_buf, sizeof(input_buf));
 394    if (len)
 395       write(master, input_buf, len);
 396    else
 397       d->stdin_is_dev_null = true;
 398 }
 399                                                                         /*}}}*/
 400 // DPkgPM::DoTerminalPty - Read the terminal pty and write log          /*{{{*/
 401 // ---------------------------------------------------------------------
 402 /*
 403  * read the terminal pty and write log
 404  */
 405 void pkgDPkgPM::DoTerminalPty(int master)
 406 {
 407    unsigned char term_buf[1024] = {0,0, };
 408
 409    ssize_t len=read(master, term_buf, sizeof(term_buf));
 410    if(len == -1 && errno == EIO)
 411    {
 412       // this happens when the child is about to exit, we
 413       // give it time to actually exit, otherwise we run
 414       // into a race so we sleep for half a second.
 415       struct timespec sleepfor = { 0, 500000000 };
 416       nanosleep(&sleepfor, NULL);
 417       return;
 418    }
 419    if(len <= 0)
 420       return;
 421    write(1, term_buf, len);
 422    if(d->term_out)
 423       fwrite(term_buf, len, sizeof(char), d->term_out);
 424 }
 425                                                                         /*}}}*/
 426 // DPkgPM::ProcessDpkgStatusBuf                                         /*{{{*/
 427 // ---------------------------------------------------------------------
 428 /*
 429  */
 430 void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
 431 {
 432    bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false);
 433    // the status we output
 434    ostringstream status;
 435
 436    if (Debug == true)
 437       std::clog << "got from dpkg '" << line << "'" << std::endl;
 438
 439
 440    /* dpkg sends strings like this:
 441       'status:   <pkg>:  <pkg  qstate>'
 442       errors look like this:
 443       'status: /var/cache/apt/archives/krecipes_0.8.1-0ubuntu1_i386.deb : error : trying to overwrite `/usr/share/doc/kde/HTML/en/krecipes/krectip.png', which is also in package krecipes-data
 444       and conffile-prompt like this
 445       'status: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited
 446
 447       Newer versions of dpkg sent also:
 448       'processing: install: pkg'
 449       'processing: configure: pkg'
 450       'processing: remove: pkg'
 451       'processing: purge: pkg'
 452       'processing: disappear: pkg'
 453       'processing: trigproc: trigger'
 454
 455    */
 456    char* list[6];
 457    //        dpkg sends multiline error messages sometimes (see
 458    //        #374195 for a example. we should support this by
 459    //        either patching dpkg to not send multiline over the
 460    //        statusfd or by rewriting the code here to deal with
 461    //        it. for now we just ignore it and not crash
 462    TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
 463    if( list[0] == NULL || list[1] == NULL || list[2] == NULL)
 464    {
 465       if (Debug == true)
 466          std::clog << "ignoring line: not enough ':'" << std::endl;
 467       return;
 468    }
 469    const char* const pkg = list[1];
 470    const char* action = _strstrip(list[2]);
 471
 472    // 'processing' from dpkg looks like
 473    // 'processing: action: pkg'
 474    if(strncmp(list[0], "processing", strlen("processing")) == 0)
 475    {
 476       char s[200];
 477       const char* const pkg_or_trigger = _strstrip(list[2]);
 478       action = _strstrip( list[1]);
 479       const std::pair<const char *, const char *> * const iter =
 480         std::find_if(PackageProcessingOpsBegin,
 481                      PackageProcessingOpsEnd,
 482                      MatchProcessingOp(action));
 483       if(iter == PackageProcessingOpsEnd)
 484       {
 485          if (Debug == true)
 486             std::clog << "ignoring unknown action: " << action << std::endl;
 487          return;
 488       }
 489       snprintf(s, sizeof(s), _(iter->second), pkg_or_trigger);
 490
 491       status << "pmstatus:" << pkg_or_trigger
 492              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 493              << ":" << s
 494              << endl;
 495       if(OutStatusFd > 0)
 496          write(OutStatusFd, status.str().c_str(), status.str().size());
 497       if (Debug == true)
 498          std::clog << "send: '" << status.str() << "'" << endl;
 499
 500       if (strncmp(action, "disappear", strlen("disappear")) == 0)
 501          handleDisappearAction(pkg_or_trigger);
 502       return;
 503    }
 504
 505    if(strncmp(action,"error",strlen("error")) == 0)
 506    {
 507       // urgs, sometime has ":" in its error string so that we
 508       // end up with the error message split between list[3]
 509       // and list[4], e.g. the message:
 510       // "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..."
 511       // concat them again
 512       if( list[4] != NULL )
 513          list[3][strlen(list[3])] = ':';
 514
 515       status << "pmerror:" << list[1]
 516              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 517              << ":" << list[3]
 518              << endl;
 519       if(OutStatusFd > 0)
 520          write(OutStatusFd, status.str().c_str(), status.str().size());
 521       if (Debug == true)
 522          std::clog << "send: '" << status.str() << "'" << endl;
 523       pkgFailures++;
 524       WriteApportReport(list[1], list[3]);
 525       return;
 526    }
 527    else if(strncmp(action,"conffile",strlen("conffile")) == 0)
 528    {
 529       status << "pmconffile:" << list[1]
 530              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 531              << ":" << list[3]
 532              << endl;
 533       if(OutStatusFd > 0)
 534          write(OutStatusFd, status.str().c_str(), status.str().size());
 535       if (Debug == true)
 536          std::clog << "send: '" << status.str() << "'" << endl;
 537       return;
 538    }
 539
 540    vector<struct DpkgState> const &states = PackageOps[pkg];
 541    const char *next_action = NULL;
 542    if(PackageOpsDone[pkg] < states.size())
 543       next_action = states[PackageOpsDone[pkg]].state;
 544    // check if the package moved to the next dpkg state
 545    if(next_action && (strcmp(action, next_action) == 0))
 546    {
 547       // only read the translation if there is actually a next
 548       // action
 549       const char *translation = _(states[PackageOpsDone[pkg]].str);
 550       char s[200];
 551       snprintf(s, sizeof(s), translation, pkg);
 552
 553       // we moved from one dpkg state to a new one, report that
 554       PackageOpsDone[pkg]++;
 555       PackagesDone++;
 556       // build the status str
 557       status << "pmstatus:" << pkg
 558              << ":"  << (PackagesDone/float(PackagesTotal)*100.0)
 559              << ":" << s
 560              << endl;
 561       if(OutStatusFd > 0)
 562          write(OutStatusFd, status.str().c_str(), status.str().size());
 563       if (Debug == true)
 564          std::clog << "send: '" << status.str() << "'" << endl;
 565    }
 566    if (Debug == true)
 567       std::clog << "(parsed from dpkg) pkg: " << pkg
 568                 << " action: " << action << endl;
 569 }
 570                                                                         /*}}}*/
 571 // DPkgPM::handleDisappearAction                                        /*{{{*/
 572 void pkgDPkgPM::handleDisappearAction(string const &pkgname)
 573 {
 574    // record the package name for display and stuff later
 575    disappearedPkgs.insert(pkgname);
 576
 577    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
 578    if (unlikely(Pkg.end() == true))
 579       return;
 580    // the disappeared package was auto-installed - nothing to do
 581    if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 582       return;
 583    pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache);
 584    if (unlikely(PkgVer.end() == true))
 585       return;
 586    /* search in the list of dependencies for (Pre)Depends,
 587       check if this dependency has a Replaces on our package
 588       and if so transfer the manual installed flag to it */
 589    for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep)
 590    {
 591       if (Dep->Type != pkgCache::Dep::Depends &&
 592           Dep->Type != pkgCache::Dep::PreDepends)
 593          continue;
 594       pkgCache::PkgIterator Tar = Dep.TargetPkg();
 595       if (unlikely(Tar.end() == true))
 596          continue;
 597       // the package is already marked as manual
 598       if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto)
 599          continue;
 600       pkgCache::VerIterator TarVer =  Cache[Tar].InstVerIter(Cache);
 601       if (TarVer.end() == true)
 602          continue;
 603       for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep)
 604       {
 605          if (Rep->Type != pkgCache::Dep::Replaces)
 606             continue;
 607          if (Pkg != Rep.TargetPkg())
 608             continue;
 609          // okay, they are strongly connected - transfer manual-bit
 610          if (Debug == true)
 611             std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl;
 612          Cache[Tar].Flags &= ~Flag::Auto;
 613          break;
 614       }
 615    }
 616 }
 617                                                                         /*}}}*/
 618 // DPkgPM::DoDpkgStatusFd                                               /*{{{*/
 619 // ---------------------------------------------------------------------
 620 /*
 621  */
 622 void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
 623 {
 624    char *p, *q;
 625    int len;
 626
 627    len=read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], sizeof(d->dpkgbuf)-d->dpkgbuf_pos);
 628    d->dpkgbuf_pos += len;
 629    if(len <= 0)
 630       return;
 631
 632    // process line by line if we have a buffer
 633    p = q = d->dpkgbuf;
 634    while((q=(char*)memchr(p, '\n', d->dpkgbuf+d->dpkgbuf_pos-p)) != NULL)
 635    {
 636       *q = 0;
 637       ProcessDpkgStatusLine(OutStatusFd, p);
 638       p=q+1; // continue with next line
 639    }
 640
 641    // now move the unprocessed bits (after the final \n that is now a 0x0)
 642    // to the start and update d->dpkgbuf_pos
 643    p = (char*)memrchr(d->dpkgbuf, 0, d->dpkgbuf_pos);
 644    if(p == NULL)
 645       return;
 646
 647    // we are interessted in the first char *after* 0x0
 648    p++;
 649
 650    // move the unprocessed tail to the start and update pos
 651    memmove(d->dpkgbuf, p, p-d->dpkgbuf);
 652    d->dpkgbuf_pos = d->dpkgbuf+d->dpkgbuf_pos-p;
 653 }
 654                                                                         /*}}}*/
 655 // DPkgPM::WriteHistoryTag                                              /*{{{*/
 656 void pkgDPkgPM::WriteHistoryTag(string const &tag, string value)
 657 {
 658    size_t const length = value.length();
 659    if (length == 0)
 660       return;
 661    // poor mans rstrip(", ")
 662    if (value[length-2] == ',' && value[length-1] == ' ')
 663       value.erase(length - 2, 2);
 664    fprintf(d->history_out, "%s: %s\n", tag.c_str(), value.c_str());
 665 }                                                                       /*}}}*/
 666 // DPkgPM::OpenLog                                                      /*{{{*/
 667 bool pkgDPkgPM::OpenLog()
 668 {
 669    string const logdir = _config->FindDir("Dir::Log");
 670    if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false)
 671       // FIXME: use a better string after freeze
 672       return _error->Error(_("Directory '%s' missing"), logdir.c_str());
 673
 674    // get current time
 675    char timestr[200];
 676    time_t const t = time(NULL);
 677    struct tm const * const tmp = localtime(&t);
 678    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 679
 680    // open terminal log
 681    string const logfile_name = flCombine(logdir,
 682                                    _config->Find("Dir::Log::Terminal"));
 683    if (!logfile_name.empty())
 684    {
 685       d->term_out = fopen(logfile_name.c_str(),"a");
 686       if (d->term_out == NULL)
 687          return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str());
 688       setvbuf(d->term_out, NULL, _IONBF, 0);
 689       SetCloseExec(fileno(d->term_out), true);
 690       struct passwd *pw;
 691       struct group *gr;
 692       pw = getpwnam("root");
 693       gr = getgrnam("adm");
 694       if (pw != NULL && gr != NULL)
 695           chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid);
 696       chmod(logfile_name.c_str(), 0644);
 697       fprintf(d->term_out, "\nLog started: %s\n", timestr);
 698    }
 699
 700    // write your history
 701    string const history_name = flCombine(logdir,
 702                                    _config->Find("Dir::Log::History"));
 703    if (!history_name.empty())
 704    {
 705       d->history_out = fopen(history_name.c_str(),"a");
 706       if (d->history_out == NULL)
 707          return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str());
 708       chmod(history_name.c_str(), 0644);
 709       fprintf(d->history_out, "\nStart-Date: %s\n", timestr);
 710       string remove, purge, install, reinstall, upgrade, downgrade;
 711       for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
 712       {
 713          enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring;
 714          string *line = NULL;
 715          #define HISTORYINFO(X, Y) { line = &X; infostring = Y; }
 716          if (Cache[I].NewInstall() == true)
 717             HISTORYINFO(install, CANDIDATE_AUTO)
 718          else if (Cache[I].ReInstall() == true)
 719             HISTORYINFO(reinstall, CANDIDATE)
 720          else if (Cache[I].Upgrade() == true)
 721             HISTORYINFO(upgrade, CURRENT_CANDIDATE)
 722          else if (Cache[I].Downgrade() == true)
 723             HISTORYINFO(downgrade, CURRENT_CANDIDATE)
 724          else if (Cache[I].Delete() == true)
 725             HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT)
 726          else
 727             continue;
 728          #undef HISTORYINFO
 729          line->append(I.FullName(false)).append(" (");
 730          switch (infostring) {
 731          case CANDIDATE: line->append(Cache[I].CandVersion); break;
 732          case CANDIDATE_AUTO:
 733             line->append(Cache[I].CandVersion);
 734             if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
 735                line->append(", automatic");
 736             break;
 737          case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break;
 738          case CURRENT: line->append(Cache[I].CurVersion); break;
 739          }
 740          line->append("), ");
 741       }
 742       if (_config->Exists("Commandline::AsString") == true)
 743          WriteHistoryTag("Commandline", _config->Find("Commandline::AsString"));
 744       WriteHistoryTag("Install", install);
 745       WriteHistoryTag("Reinstall", reinstall);
 746       WriteHistoryTag("Upgrade", upgrade);
 747       WriteHistoryTag("Downgrade",downgrade);
 748       WriteHistoryTag("Remove",remove);
 749       WriteHistoryTag("Purge",purge);
 750       fflush(d->history_out);
 751    }
 752
 753    return true;
 754 }
 755                                                                         /*}}}*/
 756 // DPkg::CloseLog                                                       /*{{{*/
 757 bool pkgDPkgPM::CloseLog()
 758 {
 759    char timestr[200];
 760    time_t t = time(NULL);
 761    struct tm *tmp = localtime(&t);
 762    strftime(timestr, sizeof(timestr), "%F  %T", tmp);
 763
 764    if(d->term_out)
 765    {
 766       fprintf(d->term_out, "Log ended: ");
 767       fprintf(d->term_out, "%s", timestr);
 768       fprintf(d->term_out, "\n");
 769       fclose(d->term_out);
 770    }
 771    d->term_out = NULL;
 772
 773    if(d->history_out)
 774    {
 775       if (disappearedPkgs.empty() == false)
 776       {
 777          string disappear;
 778          for (std::set<std::string>::const_iterator d = disappearedPkgs.begin();
 779               d != disappearedPkgs.end(); ++d)
 780          {
 781             pkgCache::PkgIterator P = Cache.FindPkg(*d);
 782             disappear.append(*d);
 783             if (P.end() == true)
 784                disappear.append(", ");
 785             else
 786                disappear.append(" (").append(Cache[P].CurVersion).append("), ");
 787          }
 788          WriteHistoryTag("Disappeared", disappear);
 789       }
 790       if (d->dpkg_error.empty() == false)
 791          fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str());
 792       fprintf(d->history_out, "End-Date: %s\n", timestr);
 793       fclose(d->history_out);
 794    }
 795    d->history_out = NULL;
 796
 797    return true;
 798 }
 799                                                                         /*}}}*/
 800 /*{{{*/
 801 // This implements a racy version of pselect for those architectures
 802 // that don't have a working implementation.
 803 // FIXME: Probably can be removed on Lenny+1
 804 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
 805    fd_set *exceptfds, const struct timespec *timeout,
 806    const sigset_t *sigmask)
 807 {
 808    sigset_t origmask;
 809    struct timeval tv;
 810    int retval;
 811
 812    tv.tv_sec = timeout->tv_sec;
 813    tv.tv_usec = timeout->tv_nsec/1000;
 814
 815    sigprocmask(SIG_SETMASK, sigmask, &origmask);
 816    retval = select(nfds, readfds, writefds, exceptfds, &tv);
 817    sigprocmask(SIG_SETMASK, &origmask, 0);
 818    return retval;
 819 }
 820 /*}}}*/
 821 // DPkgPM::Go - Run the sequence                                        /*{{{*/
 822 // ---------------------------------------------------------------------
 823 /* This globs the operations and calls dpkg
 824  *
 825  * If it is called with "OutStatusFd" set to a valid file descriptor
 826  * apt will report the install progress over this fd. It maps the
 827  * dpkg states a package goes through to human readable (and i10n-able)
 828  * names and calculates a percentage for each step.
 829 */
 830 bool pkgDPkgPM::Go(int OutStatusFd)
 831 {
 832    fd_set rfds;
 833    struct timespec tv;
 834    sigset_t sigmask;
 835    sigset_t original_sigmask;
 836
 837    unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024);
 838    unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024);
 839    bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false);
 840
 841    if (RunScripts("DPkg::Pre-Invoke") == false)
 842       return false;
 843
 844    if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false)
 845       return false;
 846
 847    // support subpressing of triggers processing for special
 848    // cases like d-i that runs the triggers handling manually
 849    bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all");
 850    bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false);
 851    if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true)
 852       List.push_back(Item(Item::ConfigurePending, PkgIterator()));
 853
 854    // map the dpkg states to the operations that are performed
 855    // (this is sorted in the same way as Item::Ops)
 856    static const struct DpkgState DpkgStatesOpMap[][7] = {
 857       // Install operation
 858       {
 859          {"half-installed", N_("Preparing %s")},
 860          {"unpacked", N_("Unpacking %s") },
 861          {NULL, NULL}
 862       },
 863       // Configure operation
 864       {
 865          {"unpacked",N_("Preparing to configure %s") },
 866          {"half-configured", N_("Configuring %s") },
 867          { "installed", N_("Installed %s")},
 868          {NULL, NULL}
 869       },
 870       // Remove operation
 871       {
 872          {"half-configured", N_("Preparing for removal of %s")},
 873          {"half-installed", N_("Removing %s")},
 874          {"config-files",  N_("Removed %s")},
 875          {NULL, NULL}
 876       },
 877       // Purge operation
 878       {
 879          {"config-files", N_("Preparing to completely remove %s")},
 880          {"not-installed", N_("Completely removed %s")},
 881          {NULL, NULL}
 882       },
 883    };
 884
 885    // init the PackageOps map, go over the list of packages that
 886    // that will be [installed|configured|removed|purged] and add
 887    // them to the PackageOps map (the dpkg states it goes through)
 888    // and the PackageOpsTranslations (human readable strings)
 889    for (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I)
 890    {
 891       if((*I).Pkg.end() == true)
 892          continue;
 893
 894       string const name = (*I).Pkg.Name();
 895       PackageOpsDone[name] = 0;
 896       for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i)
 897       {
 898          PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]);
 899          PackagesTotal++;
 900       }
 901    }
 902
 903    d->stdin_is_dev_null = false;
 904
 905    // create log
 906    OpenLog();
 907
 908    // Generate the base argument list for dpkg
 909    std::vector<const char *> Args;
 910    unsigned long StartSize = 0;
 911    string const Tmp = _config->Find("Dir::Bin::dpkg","dpkg");
 912    Args.push_back(Tmp.c_str());
 913    StartSize += Tmp.length();
 914
 915    // Stick in any custom dpkg options
 916    Configuration::Item const *Opts = _config->Tree("DPkg::Options");
 917    if (Opts != 0)
 918    {
 919       Opts = Opts->Child;
 920       for (; Opts != 0; Opts = Opts->Next)
 921       {
 922          if (Opts->Value.empty() == true)
 923             continue;
 924          Args.push_back(Opts->Value.c_str());
 925          StartSize += Opts->Value.length();
 926       }
 927    }
 928    size_t const BaseArgs = Args.size();
 929
 930    // this loop is runs once per operation
 931    for (vector<Item>::const_iterator I = List.begin(); I != List.end();)
 932    {
 933       // Do all actions with the same Op in one run
 934       vector<Item>::const_iterator J = I;
 935       if (TriggersPending == true)
 936          for (; J != List.end(); ++J)
 937          {
 938             if (J->Op == I->Op)
 939                continue;
 940             if (J->Op != Item::TriggersPending)
 941                break;
 942             vector<Item>::const_iterator T = J + 1;
 943             if (T != List.end() && T->Op == I->Op)
 944                continue;
 945             break;
 946          }
 947       else
 948          for (; J != List.end() && J->Op == I->Op; ++J)
 949             /* nothing */;
 950
 951       // keep track of allocated strings for multiarch package names
 952       std::vector<char *> Packages;
 953
 954       // start with the baseset of arguments
 955       unsigned long Size = StartSize;
 956       Args.erase(Args.begin() + BaseArgs, Args.end());
 957
 958       // Now check if we are within the MaxArgs limit
 959       //
 960       // this code below is problematic, because it may happen that
 961       // the argument list is split in a way that A depends on B
 962       // and they are in the same "--configure A B" run
 963       // - with the split they may now be configured in different
 964       //   runs, using Immediate-Configure-All can help prevent this.
 965       if (J - I > (signed)MaxArgs)
 966       {
 967          J = I + MaxArgs;
 968          Args.reserve(MaxArgs + 10);
 969       }
 970       else
 971       {
 972          Args.reserve((J - I) + 10);
 973       }
 974
 975
 976       int fd[2];
 977       pipe(fd);
 978
 979 #define ADDARG(X) Args.push_back(X); Size += strlen(X)
 980 #define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1
 981
 982       ADDARGC("--status-fd");
 983       char status_fd_buf[20];
 984       snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]);
 985       ADDARG(status_fd_buf);
 986       unsigned long const Op = I->Op;
 987
 988       switch (I->Op)
 989       {
 990          case Item::Remove:
 991          ADDARGC("--force-depends");
 992          ADDARGC("--force-remove-essential");
 993          ADDARGC("--remove");
 994          break;
 995
 996          case Item::Purge:
 997          ADDARGC("--force-depends");
 998          ADDARGC("--force-remove-essential");
 999          ADDARGC("--purge");
1000          break;
1001
1002          case Item::Configure:
1003          ADDARGC("--configure");
1004          break;
1005
1006          case Item::ConfigurePending:
1007          ADDARGC("--configure");
1008          ADDARGC("--pending");
1009          break;
1010
1011          case Item::TriggersPending:
1012          ADDARGC("--triggers-only");
1013          ADDARGC("--pending");
1014          break;
1015
1016          case Item::Install:
1017          ADDARGC("--unpack");
1018          ADDARGC("--auto-deconfigure");
1019          break;
1020       }
1021
1022       if (NoTriggers == true && I->Op != Item::TriggersPending &&
1023           I->Op != Item::ConfigurePending)
1024       {
1025          ADDARGC("--no-triggers");
1026       }
1027 #undef ADDARGC
1028
1029       // Write in the file or package names
1030       if (I->Op == Item::Install)
1031       {
1032          for (;I != J && Size < MaxArgBytes; ++I)
1033          {
1034             if (I->File[0] != '/')
1035                return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str());
1036             Args.push_back(I->File.c_str());
1037             Size += I->File.length();
1038          }
1039       }
1040       else
1041       {
1042          string const nativeArch = _config->Find("APT::Architecture");
1043          unsigned long const oldSize = I->Op == Item::Configure ? Size : 0;
1044          for (;I != J && Size < MaxArgBytes; ++I)
1045          {
1046             if((*I).Pkg.end() == true)
1047                continue;
1048             if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.Name()) != disappearedPkgs.end())
1049                continue;
1050             if (I->Pkg.Arch() == nativeArch || !strcmp(I->Pkg.Arch(), "all"))
1051             {
1052                char const * const name = I->Pkg.Name();
1053                ADDARG(name);
1054             }
1055             else
1056             {
1057                char * const fullname = strdup(I->Pkg.FullName(false).c_str());
1058                Packages.push_back(fullname);
1059                ADDARG(fullname);
1060             }
1061          }
1062          // skip configure action if all sheduled packages disappeared
1063          if (oldSize == Size)
1064             continue;
1065       }
1066 #undef ADDARG
1067
1068       J = I;
1069
1070       if (_config->FindB("Debug::pkgDPkgPM",false) == true)
1071       {
1072          for (std::vector<const char *>::const_iterator a = Args.begin();
1073               a != Args.end(); ++a)
1074             clog << *a << ' ';
1075          clog << endl;
1076          continue;
1077       }
1078       Args.push_back(NULL);
1079
1080       cout << flush;
1081       clog << flush;
1082       cerr << flush;
1083
1084       /* Mask off sig int/quit. We do this because dpkg also does when
1085          it forks scripts. What happens is that when you hit ctrl-c it sends
1086          it to all processes in the group. Since dpkg ignores the signal
1087          it doesn't die but we do! So we must also ignore it */
1088       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
1089       sighandler_t old_SIGINT = signal(SIGINT,SigINT);
1090
1091       // Check here for any SIGINT
1092       if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install))
1093          break;
1094
1095
1096       // ignore SIGHUP as well (debian #463030)
1097       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
1098
1099       struct    termios tt;
1100       struct    winsize win;
1101       int       master = -1;
1102       int       slave = -1;
1103
1104       // if tcgetattr does not return zero there was a error
1105       // and we do not do any pty magic
1106       if (tcgetattr(0, &tt) == 0)
1107       {
1108          ioctl(0, TIOCGWINSZ, (char *)&win);
1109          if (openpty(&master, &slave, NULL, &tt, &win) < 0)
1110          {
1111             const char *s = _("Can not write log, openpty() "
1112                               "failed (/dev/pts not mounted?)\n");
1113             fprintf(stderr, "%s",s);
1114             if(d->term_out)
1115               fprintf(d->term_out, "%s",s);
1116             master = slave = -1;
1117          }  else {
1118             struct termios rtt;
1119             rtt = tt;
1120             cfmakeraw(&rtt);
1121             rtt.c_lflag &= ~ECHO;
1122             rtt.c_lflag |= ISIG;
1123             // block SIGTTOU during tcsetattr to prevent a hang if
1124             // the process is a member of the background process group
1125             // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html
1126             sigemptyset(&sigmask);
1127             sigaddset(&sigmask, SIGTTOU);
1128             sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask);
1129             tcsetattr(0, TCSAFLUSH, &rtt);
1130             sigprocmask(SIG_SETMASK, &original_sigmask, 0);
1131          }
1132       }
1133        // Fork dpkg
1134       pid_t Child;
1135       _config->Set("APT::Keep-Fds::",fd[1]);
1136       // send status information that we are about to fork dpkg
1137       if(OutStatusFd > 0) {
1138          ostringstream status;
1139          status << "pmstatus:dpkg-exec:"
1140                 << (PackagesDone/float(PackagesTotal)*100.0)
1141                 << ":" << _("Running dpkg")
1142                 << endl;
1143          write(OutStatusFd, status.str().c_str(), status.str().size());
1144       }
1145       Child = ExecFork();
1146
1147       // This is the child
1148       if (Child == 0)
1149       {
1150          if(slave >= 0 && master >= 0)
1151          {
1152             setsid();
1153             ioctl(slave, TIOCSCTTY, 0);
1154             close(master);
1155             dup2(slave, 0);
1156             dup2(slave, 1);
1157             dup2(slave, 2);
1158             close(slave);
1159          }
1160          close(fd[0]); // close the read end of the pipe
1161
1162          if (_config->FindDir("DPkg::Chroot-Directory","/") != "/")
1163          {
1164             std::cerr << "Chrooting into "
1165                       << _config->FindDir("DPkg::Chroot-Directory")
1166                       << std::endl;
1167             if (chroot(_config->FindDir("DPkg::Chroot-Directory","/").c_str()) != 0)
1168                _exit(100);
1169          }
1170
1171          if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
1172             _exit(100);
1173
1174          if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO))
1175          {
1176             int Flags,dummy;
1177             if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0)
1178                _exit(100);
1179
1180             // Discard everything in stdin before forking dpkg
1181             if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0)
1182                _exit(100);
1183
1184             while (read(STDIN_FILENO,&dummy,1) == 1);
1185
1186             if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
1187                _exit(100);
1188          }
1189
1190          /* No Job Control Stop Env is a magic dpkg var that prevents it
1191             from using sigstop */
1192          putenv((char *)"DPKG_NO_TSTP=yes");
1193          execvp(Args[0], (char**) &Args[0]);
1194          cerr << "Could not exec dpkg!" << endl;
1195          _exit(100);
1196       }
1197
1198       // apply ionice
1199       if (_config->FindB("DPkg::UseIoNice", false) == true)
1200          ionice(Child);
1201
1202       // clear the Keep-Fd again
1203       _config->Clear("APT::Keep-Fds",fd[1]);
1204
1205       // Wait for dpkg
1206       int Status = 0;
1207
1208       // we read from dpkg here
1209       int const _dpkgin = fd[0];
1210       close(fd[1]);                        // close the write end of the pipe
1211
1212       if(slave > 0)
1213          close(slave);
1214
1215       // setups fds
1216       sigemptyset(&sigmask);
1217       sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
1218
1219       /* free vectors (and therefore memory) as we don't need the included data anymore */
1220       for (std::vector<char *>::const_iterator p = Packages.begin();
1221            p != Packages.end(); ++p)
1222          free(*p);
1223       Packages.clear();
1224
1225       // the result of the waitpid call
1226       int res;
1227       int select_ret;
1228       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
1229          if(res < 0) {
1230             // FIXME: move this to a function or something, looks ugly here
1231             // error handling, waitpid returned -1
1232             if (errno == EINTR)
1233                continue;
1234             RunScripts("DPkg::Post-Invoke");
1235
1236             // Restore sig int/quit
1237             signal(SIGQUIT,old_SIGQUIT);
1238             signal(SIGINT,old_SIGINT);
1239
1240             signal(SIGHUP,old_SIGHUP);
1241             return _error->Errno("waitpid","Couldn't wait for subprocess");
1242          }
1243
1244          // wait for input or output here
1245          FD_ZERO(&rfds);
1246          if (master >= 0 && !d->stdin_is_dev_null)
1247             FD_SET(0, &rfds);
1248          FD_SET(_dpkgin, &rfds);
1249          if(master >= 0)
1250             FD_SET(master, &rfds);
1251          tv.tv_sec = 1;
1252          tv.tv_nsec = 0;
1253          select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL,
1254                               &tv, &original_sigmask);
1255          if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
1256             select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
1257                                       NULL, &tv, &original_sigmask);
1258          if (select_ret == 0)
1259             continue;
1260          else if (select_ret < 0 && errno == EINTR)
1261             continue;
1262          else if (select_ret < 0)
1263          {
1264             perror("select() returned error");
1265             continue;
1266          }
1267
1268          if(master >= 0 && FD_ISSET(master, &rfds))
1269             DoTerminalPty(master);
1270          if(master >= 0 && FD_ISSET(0, &rfds))
1271             DoStdin(master);
1272          if(FD_ISSET(_dpkgin, &rfds))
1273             DoDpkgStatusFd(_dpkgin, OutStatusFd);
1274       }
1275       close(_dpkgin);
1276
1277       // Restore sig int/quit
1278       signal(SIGQUIT,old_SIGQUIT);
1279       signal(SIGINT,old_SIGINT);
1280
1281       signal(SIGHUP,old_SIGHUP);
1282
1283       if(master >= 0)
1284       {
1285          tcsetattr(0, TCSAFLUSH, &tt);
1286          close(master);
1287       }
1288
1289       // Check for an error code.
1290       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
1291       {
1292          // if it was set to "keep-dpkg-runing" then we won't return
1293          // here but keep the loop going and just report it as a error
1294          // for later
1295          bool const stopOnError = _config->FindB("Dpkg::StopOnError",true);
1296
1297          if(stopOnError)
1298             RunScripts("DPkg::Post-Invoke");
1299
1300          if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
1301             strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]);
1302          else if (WIFEXITED(Status) != 0)
1303             strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status));
1304          else
1305             strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]);
1306
1307          if(d->dpkg_error.size() > 0)
1308             _error->Error("%s", d->dpkg_error.c_str());
1309
1310          if(stopOnError)
1311          {
1312             CloseLog();
1313             return false;
1314          }
1315       }
1316    }
1317    CloseLog();
1318
1319    if (pkgPackageManager::SigINTStop)
1320        _error->Warning(_("Operation was interrupted before it could finish"));
1321
1322    if (RunScripts("DPkg::Post-Invoke") == false)
1323       return false;
1324
1325    if (_config->FindB("Debug::pkgDPkgPM",false) == false)
1326    {
1327       std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache");
1328       if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true &&
1329           unlink(oldpkgcache.c_str()) == 0)
1330       {
1331          std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
1332          if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
1333          {
1334             _error->PushToStack();
1335             pkgCacheFile CacheFile;
1336             CacheFile.BuildCaches(NULL, true);
1337             _error->RevertToStack();
1338          }
1339       }
1340    }
1341
1342    Cache.writeStateFile(NULL);
1343    return true;
1344 }
1345
1346 void SigINT(int sig) {
1347    if (_config->FindB("APT::Immediate-Configure-All",false))
1348       pkgPackageManager::SigINTStop = true;
1349 }
1350                                                                         /*}}}*/
1351 // pkgDpkgPM::Reset - Dump the contents of the command list             /*{{{*/
1352 // ---------------------------------------------------------------------
1353 /* */
1354 void pkgDPkgPM::Reset()
1355 {
1356    List.erase(List.begin(),List.end());
1357 }
1358                                                                         /*}}}*/
1359 // pkgDpkgPM::WriteApportReport - write out error report pkg failure    /*{{{*/
1360 // ---------------------------------------------------------------------
1361 /* */
1362 void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
1363 {
1364    string pkgname, reportfile, srcpkgname, pkgver, arch;
1365    string::size_type pos;
1366    FILE *report;
1367
1368    if (_config->FindB("Dpkg::ApportFailureReport", false) == false)
1369    {
1370       std::clog << "configured to not write apport reports" << std::endl;
1371       return;
1372    }
1373
1374    // only report the first errors
1375    if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3))
1376    {
1377       std::clog << _("No apport report written because MaxReports is reached already") << std::endl;
1378       return;
1379    }
1380
1381    // check if its not a follow up error
1382    const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured");
1383    if(strstr(errormsg, needle) != NULL) {
1384       std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl;
1385       return;
1386    }
1387
1388    // do not report disk-full failures
1389    if(strstr(errormsg, strerror(ENOSPC)) != NULL) {
1390       std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl;
1391       return;
1392    }
1393
1394    // do not report out-of-memory failures
1395    if(strstr(errormsg, strerror(ENOMEM)) != NULL) {
1396       std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl;
1397       return;
1398    }
1399
1400    // do not report dpkg I/O errors
1401    // XXX - this message is localized, but this only matches the English version.  This is better than nothing.
1402    if(strstr(errormsg, "short read in buffer_copy (")) {
1403       std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl;
1404       return;
1405    }
1406
1407    // get the pkgname and reportfile
1408    pkgname = flNotDir(pkgpath);
1409    pos = pkgname.find('_');
1410    if(pos != string::npos)
1411       pkgname = pkgname.substr(0, pos);
1412
1413    // find the package versin and source package name
1414    pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname);
1415    if (Pkg.end() == true)
1416       return;
1417    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
1418    if (Ver.end() == true)
1419       return;
1420    pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
1421    pkgRecords Recs(Cache);
1422    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
1423    srcpkgname = Parse.SourcePkg();
1424    if(srcpkgname.empty())
1425       srcpkgname = pkgname;
1426
1427    // if the file exists already, we check:
1428    // - if it was reported already (touched by apport).
1429    //   If not, we do nothing, otherwise
1430    //    we overwrite it. This is the same behaviour as apport
1431    // - if we have a report with the same pkgversion already
1432    //   then we skip it
1433    reportfile = flCombine("/var/crash",pkgname+".0.crash");
1434    if(FileExists(reportfile))
1435    {
1436       struct stat buf;
1437       char strbuf[255];
1438
1439       // check atime/mtime
1440       stat(reportfile.c_str(), &buf);
1441       if(buf.st_mtime > buf.st_atime)
1442          return;
1443
1444       // check if the existing report is the same version
1445       report = fopen(reportfile.c_str(),"r");
1446       while(fgets(strbuf, sizeof(strbuf), report) != NULL)
1447       {
1448          if(strstr(strbuf,"Package:") == strbuf)
1449          {
1450             char pkgname[255], version[255];
1451             if(sscanf(strbuf, "Package: %s %s", pkgname, version) == 2)
1452                if(strcmp(pkgver.c_str(), version) == 0)
1453                {
1454                   fclose(report);
1455                   return;
1456                }
1457          }
1458       }
1459       fclose(report);
1460    }
1461
1462    // now write the report
1463    arch = _config->Find("APT::Architecture");
1464    report = fopen(reportfile.c_str(),"w");
1465    if(report == NULL)
1466       return;
1467    if(_config->FindB("DPkgPM::InitialReportOnly",false) == true)
1468       chmod(reportfile.c_str(), 0);
1469    else
1470       chmod(reportfile.c_str(), 0600);
1471    fprintf(report, "ProblemType: Package\n");
1472    fprintf(report, "Architecture: %s\n", arch.c_str());
1473    time_t now = time(NULL);
1474    fprintf(report, "Date: %s" , ctime(&now));
1475    fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str());
1476    fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str());
1477    fprintf(report, "ErrorMessage:\n %s\n", errormsg);
1478
1479    // ensure that the log is flushed
1480    if(d->term_out)
1481       fflush(d->term_out);
1482
1483    // attach terminal log it if we have it
1484    string logfile_name = _config->FindFile("Dir::Log::Terminal");
1485    if (!logfile_name.empty())
1486    {
1487       FILE *log = NULL;
1488       char buf[1024];
1489
1490       fprintf(report, "DpkgTerminalLog:\n");
1491       log = fopen(logfile_name.c_str(),"r");
1492       if(log != NULL)
1493       {
1494          while( fgets(buf, sizeof(buf), log) != NULL)
1495             fprintf(report, " %s", buf);
1496          fclose(log);
1497       }
1498    }
1499
1500    // log the ordering
1501    const char *ops_str[] = {"Install", "Configure","Remove","Purge"};
1502    fprintf(report, "AptOrdering:\n");
1503    for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I)
1504       fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]);
1505
1506    // attach dmesg log (to learn about segfaults)
1507    if (FileExists("/bin/dmesg"))
1508    {
1509       FILE *log = NULL;
1510       char buf[1024];
1511
1512       fprintf(report, "Dmesg:\n");
1513       log = popen("/bin/dmesg","r");
1514       if(log != NULL)
1515       {
1516          while( fgets(buf, sizeof(buf), log) != NULL)
1517             fprintf(report, " %s", buf);
1518          pclose(log);
1519       }
1520    }
1521
1522    // attach df -l log (to learn about filesystem status)
1523    if (FileExists("/bin/df"))
1524    {
1525       FILE *log = NULL;
1526       char buf[1024];
1527
1528       fprintf(report, "Df:\n");
1529       log = popen("/bin/df -l","r");
1530       if(log != NULL)
1531       {
1532          while( fgets(buf, sizeof(buf), log) != NULL)
1533             fprintf(report, " %s", buf);
1534          pclose(log);
1535       }
1536    }
1537
1538    fclose(report);
1539
1540 }
1541                                                                         /*}}}*/